I have both styles of White, the main differences are the length of pull of the stock, the length of the action and the way the actions are cocked. The S91/II have a longer pull than the Ultra Mags, the action is about 2" longer on the S91 and the action is cocked by pulling a knob on the back where the Ultra Mag has a lever on the side of the action.

Each has its own appeal. My first White was a G-Series Whitetail (predisesor to the Ultra Mag) so I am partial to that style. It is shorter and quicker to point. The S91 being a longer gun points a bit slower but is more stable feeling.

As far as shooting them, the barrels are of good quality and they shoot very well. I like the safety of the S91 better than the Ultra Mag but I like the side cocking lever of Ultra Mag.

I guess I guy should handle each and decide. Either way they are both good guns.

GB